<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>05-findIndex</title>
</head>

<body>
    <script>
        let arr = [
            { id: 1, name: "项羽" },
            { id: 2, name: "剑圣" },
            { id: 3, name: "盲僧" },
            { id: 4, name: "使者" },
            { id: 2, name: "兽王" },
        ];
        let result = arr.findIndex((item,index) => {
            console.log(item,index);
            if(item.id == 2){
                return true;
            }
        });
        console.log(result);  //1

        // findIndex() 找到第一个符合条件的元素的索引值，如果没有则返回 -1
		// return true，表示查找结束,循环不再继续。返回元素的index
    </script>
</body>

</html>